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importantly, rename all related macros to be in the b4_percent_define and b4_percent_code namespaces. Also, complete support for `.' in %define variable names and %code qualifiers. * data/bison.m4 (b4_check_user_names): Check for special "SKELETON-NAMESPACE(name)" macros instead of using two nested m4_foreach loops. (b4_get_percent_define, b4_get_percent_code): Rename to... (b4_percent_define_get, b4_percent_code_get): ... these. Extend documentation with examples. For SKELETON-NAMESPACE (as documented for b4_check_user_names), use b4_percent_define_skeleton_variables and b4_percent_code_skeleton_qualifiers. Expect any value for the %define variable `foo' to be stored in the macro named `b4_percent_define(foo)'; expect any %code blocks for the qualifier `foo' to be stored in a macro named `b4_percent_code(foo)'; expect any unqualified %code blocks to be stored in a macro named `b4_percent_code_unqualified'. Use m4_indir so that %define variable names and %code qualifiers can contain `.', which is allowed by the grammar parser. (b4_percent_define_default): New macro to set a default value for a %define variable. (m4_wrap): Update wrapped code, and fix some underquoting. (b4_check_user_names_wrap): Update and define outside the m4_wrap. Expect grammar uses of %define variables and %code qualifiers to be defined in b4_percent_define_user_variables and b4_percent_code_user_qualifiers. * data/c++.m4: Use b4_percent_define_default rather than m4_define_default. Fix some underquoting. Skeleton usage of %define variable define_location_comparison now implies skeleton usage of %define variable filename_type. * data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, data/push.c, data/yacc.c: Update macro names. * src/parse-gram.y (prologue_declaration, grammar_declaration): Update muscle names.
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